--- title: "Clean Truck Check Testers in Gilroy, CA (13 listed)" description: "Find 13 CARB-credentialed Clean Truck Check testers in Gilroy, Santa Clara County: 10 offer mobile testing, 3 do smoke opacity tests. Phone numbers, services…" url: "https://ctcfinder.com/testers/santa-clara-county/gilroy/" updated: "2026-11-01" publisher: "CTC Finder (independent directory, not affiliated with CARB)" --- # Clean Truck Check testers in Gilroy, CA 13 testing businesses in Gilroy (Santa Clara County) are on CARB's public Clean Truck Check tester list (15 credentialed testers). 10 offer mobile testing, 3 do smoke opacity tests, 7 test motorhomes. > CTC Finder is an independent directory, not affiliated with CARB. Tester data: CARB Clean Truck Check public tester list, last checked November 1, 2026. Confirm services, hours and prices with the tester. ## Testers in Gilroy - **[Maggiora Bro Drilling](https://ctcfinder.com/tester/maggiora-bro-drilling-gilroy/)** — Gilroy, CA 95020 — (669) 469-9223. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Unified Truck Services Inc.](https://ctcfinder.com/tester/unified-truck-services-inc-gilroy/)** — 7370 Orchard Dr, Gilroy, CA 95020 — (408) 420-2866. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[B&L Truck and Tractor Repair](https://ctcfinder.com/tester/b-and-l-truck-and-tractor-repair-gilroy/)** — 8594 Forest St, Gilroy, CA 95020 — (831) 889-8611. Services: mobile testing, OBD testing, motorhome testing. - **[Cruz Tire & Truck Repair](https://ctcfinder.com/tester/cruz-tire-and-truck-repair-gilroy/)** — 5870 Monterey Rd A, Gilroy, CA 95020 — (909) 533-0433. Services: mobile testing, OBD testing. - **[Dhillon CARB Testing](https://ctcfinder.com/tester/dhillon-carb-testing-gilroy/)** — 1125 Violet Way, Gilroy, CA 95020 — (408) 775-9600. Services: mobile testing, OBD testing. - **[Mateo Huerta](https://ctcfinder.com/tester/mateo-huerta-gilroy/)** — Gilroy, CA 95020 — (650) 290-0652. Services: mobile testing, OBD testing. - **[Mosher Equipment Services LLC](https://ctcfinder.com/tester/mosher-equipment-services-llc-gilroy/)** — 1290 Masten Ave, Gilroy, CA 95020 — (408) 660-5693. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Premier Diesel LLC](https://ctcfinder.com/tester/premier-diesel-llc-gilroy/)** — 6484 Automall Pkwy, Gilroy, CA 95020 — (408) 842-2999. Services: OBD testing. - **[Prime Smog Check & Repair LLC](https://ctcfinder.com/tester/prime-smog-check-and-repair-llc-gilroy/)** — 505 Mayock Rd Suite E-17, Gilroy, CA 95020 — (408) 337-1547. Services: mobile testing, OBD testing, motorhome testing. - **[Ramil Dangca](https://ctcfinder.com/tester/ramil-dangca-gilroy/)** — Gilroy, CA 95020 — (650) 380-6144. Services: not listed. - **[Redmans Automotive](https://ctcfinder.com/tester/redmans-automotive-gilroy/)** — 20 E Luchessa Ave, Gilroy, CA 95020 — (408) 842-0663. Services: OBD testing, motorhome testing. - **[Samuel Zepeda Gonzalez](https://ctcfinder.com/tester/samuel-zepeda-gonzalez-gilroy/)** — Gilroy, CA 95020 — (408) 612-2931. Services: mobile testing, OBD testing. - **[Todd Simmons](https://ctcfinder.com/tester/todd-simmons-gilroy/)** — Gilroy, CA 95020 — (831) 756-8109. Services: mobile testing, OBD testing, motorhome testing. ## More testers within 20 miles - **[CA Truck Compliance Group](https://ctcfinder.com/tester/ca-truck-compliance-group-san-martin/)** — 40 E San Martin Ave, San Martin, CA 95046 — (408) 360-7700 — 6 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Jim Acker](https://ctcfinder.com/tester/jim-acker-san-martin/)** — San Martin, CA 95046 — (408) 710-6078 — 6 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Caddell Fleet Services](https://ctcfinder.com/tester/caddell-fleet-services-morgan-hill/)** — 16160 Church St, Morgan Hill, CA 95037 — (408) 599-9295 — 10 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Cali Smoke Testing](https://ctcfinder.com/tester/cali-smoke-testing-morgan-hill/)** — 2505 Pinto Ct, Morgan Hill, CA 95037 — (408) 427-2236 — 10 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Direct Fleet Scan](https://ctcfinder.com/tester/direct-fleet-scan-morgan-hill/)** — 305 Vineyard Town Ctr, Morgan Hill, CA 95037 — (408) 710-6489 — 10 mi. Services: mobile testing, OBD testing. - **[Jose Gonzalez Sandoval](https://ctcfinder.com/tester/jose-gonzalez-sandoval-morgan-hill/)** — Morgan Hill, CA 95037 — (707) 430-1829 — 10 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Morgan Hill Smog](https://ctcfinder.com/tester/morgan-hill-smog-morgan-hill/)** — 195 San Pedro Ave Suite C 5, Morgan Hill, CA 95037 — (408) 763-1903 — 10 mi. Services: mobile testing, OBD testing. - **[Norcal Inspections](https://ctcfinder.com/tester/norcal-inspections-morgan-hill/)** — 2505 Pinto Ct, Morgan Hill, CA 95037 — (408) 828-2080 — 10 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Betos mobile & truck services LLC](https://ctcfinder.com/tester/betos-mobile-and-truck-services-llc-royal-oaks/)** — 415 Hall Rd, Royal Oaks, CA 95076 — (831) 247-0392 — 12 mi. Services: mobile testing, OBD testing. - **[Alex Lopez](https://ctcfinder.com/tester/alex-lopez-watsonville/)** — Watsonville, CA 95076 — (831) 566-1827 — 12 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Best Service Automotive & Truck Repair](https://ctcfinder.com/tester/best-service-automotive-and-truck-repair-watsonville/)** — 18 Walker St, Watsonville, CA 95076 — (831) 353-1533 — 12 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Crafton’s smog check](https://ctcfinder.com/tester/craftons-smog-check-watsonville/)** — 771 Freedom Blvd, Watsonville, CA 95076 — (831) 227-3766 — 12 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. ## Trucking in Gilroy Santa Clara County has the largest number of listed testers in the Bay Area. ## Cost Typical published prices in California: OBD test $50–$135 per vehicle; smoke opacity test $190–$200. Prices are set by each tester. ## Frequently asked questions ### How many Clean Truck Check testers are in Gilroy? CTC Finder lists 13 testing businesses in Gilroy from CARB's public tester list (15 credentialed testers), last checked November 1, 2026. Listing on CARB's list is optional, so the real number can be higher. ### Is there mobile Clean Truck Check testing in Gilroy? Yes. 10 listed businesses in Gilroy offer mobile testing, which means the tester comes to your yard. Use the Mobile filter above to see them. ### How much does a Clean Truck Check test cost in Gilroy? Testers set their own prices. Published prices for an OBD test are usually $50–$135 per vehicle; smoke opacity tests for older trucks often cost more, and mobile testers may add a trip fee. See the [cost guide](https://ctcfinder.com/guide/cost/). ### How often does my truck need a Clean Truck Check test? Most trucks test twice a year, on a schedule tied to the DMV registration expiration date. CARB says OBD trucks move to four tests a year beginning October 2027. California-registered (non-commercial) motorhomes and agricultural vehicles test once a year. See the [deadline guide](https://ctcfinder.com/guide/deadlines-2026-2027/). ## Nearby cities - [Morgan Hill](https://ctcfinder.com/testers/santa-clara-county/morgan-hill/) — 6 listings, 10 mi - [Watsonville](https://ctcfinder.com/testers/santa-cruz-county/watsonville/) — 10 listings, 12 mi - [Hollister](https://ctcfinder.com/testers/san-benito-county/hollister/) — 7 listings, 15 mi - [Salinas](https://ctcfinder.com/testers/monterey-county/salinas/) — 21 listings, 23 mi - [Santa Cruz](https://ctcfinder.com/testers/santa-cruz-county/santa-cruz/) — 3 listings, 26 mi - [San Jose](https://ctcfinder.com/testers/santa-clara-county/san-jose/) — 41 listings, 27 mi - [Campbell](https://ctcfinder.com/testers/santa-clara-county/campbell/) — 3 listings, 28 mi - [Milpitas](https://ctcfinder.com/testers/santa-clara-county/milpitas/) — 3 listings, 34 mi - [Monterey](https://ctcfinder.com/testers/monterey-county/monterey/) — 3 listings, 34 mi - [Santa Clara](https://ctcfinder.com/testers/santa-clara-county/santa-clara/) — 3 listings, 34 mi